diff options
author | Santo Cariotti <santo@dcariotti.me> | 2021-03-24 22:44:05 +0100 |
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committer | Santo Cariotti <santo@dcariotti.me> | 2021-03-24 22:44:05 +0100 |
commit | 2e73951013d33b2ef772ffe20a8242a4293d332e (patch) | |
tree | e4a856dff9857ccdfb570a196e76721b513766d6 /chapters | |
parent | a0b3e5f8b5faf110f3ca9534a2e552896ce58297 (diff) |
chapter5: fix typo and added sections
Diffstat (limited to 'chapters')
-rw-r--r-- | chapters/physic.tex | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/chapters/physic.tex b/chapters/physic.tex index 2521f4d..2725fd0 100644 --- a/chapters/physic.tex +++ b/chapters/physic.tex @@ -3,9 +3,9 @@ Qui di seguito è riportato il \verb|dump| in SQL per la creazione delle tabelle CREATE TABLE "repository" ( id uuid PRIMARY KEY NOT NULL, url varchar(255) UNIQUE NOT NULL, - created_date timestamp NOT NULL, - updated_date timestamp NOT NULL, - uploader_ip varchar(15) NOT NULL + created_at timestamp NOT NULL DEFAULT NOW(), + updated_at timestamp NOT NULL DEFAULT NOW(), + uploader_ip varchar(21) NOT NULL ); CREATE TABLE "email"( @@ -17,7 +17,7 @@ CREATE TABLE "commit" ( hash varchar(40) PRIMARY KEY NOT NULL, tree varchar(40) REFERENCES commit(hash) NULL, text text NOT NULL, - date timestamp NOT NULL, + date timestamptz NOT NULL, author_email varchar(120) REFERENCES email(email) NOT NULL, author_name varchar(120) NOT NULL, committer_email varchar(120) REFERENCES email(email) NOT NULL, @@ -31,4 +31,29 @@ CREATE TABLE "branch" ( repository_id uuid REFERENCES repository(id) NOT NULL, head varchar(40) REFERENCES commit(hash) NULL ); -\end{lstlisting}
\ No newline at end of file +\end{lstlisting} + +\section{Trigger} +Qui di seguito si viene implementato un trigger che aggiorna automaticamente la data di \verb|updated_at| ogni qual volta si viene modificata una \verb|Repository|. +\begin{lstlisting}[language=SQL] +CREATE OR REPLACE FUNCTION update_repository_last_updates() RETURNS TRIGGER AS $$ +BEGIN + NEW."updated_at" = NOW(); + RETURN NEW; +END; +$$ LANGUAGE PLPGSQL; + +CREATE TRIGGER update_repository_t BEFORE UPDATE ON repository +FOR EACH ROW +EXECUTE PROCEDURE update_repository_last_updates(); +\end{lstlisting} + +\section{Top authors} +Lato client si sarebbero potuti esaminare i dati presi dai commit ma, per velocizzare il tutto lato client, ho preferito inserire una query lato server con un'endpoint per trovare la TOP 7 degli sviluppatori con più commit di cui sono autori. \textit{Ho preferito non considerare i committers perché, se presi da GitHub, automaticamente il committer sarà sempre noreply@github.com}. + +\begin{lstlisting}[language=SQL] +SELECT COUNT(hash) as num, author_email, author_name +FROM commit +GROUP BY author_email, author_name +ORDER BY COUNT(hash) DESC +\end{lstlisting} |